CHEMICAL REACTION ENGINEERING QUIZ

What is the dispersion number for a plug flow reactor?

-1

?

1

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Knudsen diffusion is directly proportional to

T₂

√T

1/√T

T

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The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of E/R is

8621°K

9210°K

8764°K

8987°K

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A batch reactor is characterised by

Variation in extent of reaction and properties of the reaction mixture with time

Constant residence time

Very low conversion

Variation in reactor volume

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When a catalyst increases the rate of chemical reaction, the rate constant

Remains constant

Becomes infinite

Increases

Decreases

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Fractional conversion __________ for an exothermic reversible chemical reaction, when the temperature is maximum.

Unpredictable from the data

Increases

Decreases

Remains unchanged

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Kinetics of a solid catalysed reaction can best be studied in a __________ reactor.

None of these

Batch

Plug-flow

Mixed

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Catalyst carriers

Provide large surface area with a small amount of active material

Have very high selectivity

Increase the activity of a catalyst

Inhibit catalyst poisoning

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A batch reactor is suitable for

Large scale gaseous phase reactions

Liquid phase reactions

Achieving cent percent conversion of reactants into products

Obtaining uniform polymerisation products in highly exothermic reactions

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A balanced chemical reaction equation conforms to the law of

Avagadro's hypothesis

Conservation of mass

Gaseous volumes

None ofthese

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